I'm a new member of VN750, having bought a neglected '85 VN700 a few weeks ago. I bought the bike as a near-basket case that would barely run. I traced the problem down to the carbs (spark & compression was fine), and discovered that the fuel lines were set-up incorrectly - the lines from the petcocks ran directly to the vacuum lines! (primitive direct injection? LOL!). Anyway, using the excellent labelled pictures you've provided the forum, I was able to reorganize the fuel & carb vent lines to their correct locations/destinations... the bike now starts & runs fairly well... I just don't know what to do with the vacuum fittings on each carb.... any suggestions on how to rout them and to where?)... any help from you or any other forum members would be greatly appreciated!
Best Regards to All,